Single pumps

Normally install a suitable filter on the return pipe to the maximum value of the discharge flow.
In general, a 40 micron filtration is recommended, or;
– for discontinuous service and / or hard work: 90 ÷ 60 microns
– for continuous service and / or heavy duty: 60 ÷ 25 microns
A suction filter is exceptionally permissible, but not applicable to pumps without caps. Then limit the use of these filters to systems with discontinuous and / or light service, frequently inspecting them if immersed or if they do not have a clogging indicator.
Then install on the tank an air filter proportionate to the degree of environmental pollution.

Once the oil has been filled and the air is well drained, the pump is activated by operating it by impulse, without subjecting it to pressure. Excessive noise and / or pulsations The irregular ones indicate an incomplete primer: insist with impulse rotation and with possible very short pressures. it will rarely be necessary to fill the cylinders through the orifices of the suction valves.
– During the first hours of work, check the filter several times, especially if it is on the suction side.
– When starting cold, start the exercise only after several minutes of modest pressure.
– Especially for heavy duty or continuous use, we recommend:
1) check the cleaning of the oil and air filters every month, the degree of aging and dirt of the fluid, and its level;
2) replace the oil after about 2000 hours of service or 1 ÷ 2 times a year, after washing the tank;
3) occasionally check that, during operation, the oil temperature does not exceed 60 ÷ 70 ° C.